package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;

/**
 * 套餐业务实现
 */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;


    /**
     * @description
     ***:新增套餐，同事要保存套餐和菜品的关联关系
     **/
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //插入数据
        setmealMapper.inster(setmeal);

        //获取生成的套餐id
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * @description
     ***:分页查询套餐
     **/
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        int pageNum = setmealPageQueryDTO.getPage();
        int pageSize = setmealPageQueryDTO.getPageSize();

        PageHelper.startPage(pageNum,pageSize);
       Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * @description
     ***:删除套餐
     **/
    @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id->{
            Setmeal setmeal = setmealMapper.getById(id);
            if (StatusConstant.ENABLE == setmeal.getStatus()){
                //起售中的商品不能被删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        ids.forEach(setmealId->{
            setmealMapper.deleteById(setmealId);
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

    /**
     * @description
     ***:根据id查询套餐和套餐菜品关系
     **/
    public SetmealVO getByIdWithDish(Long id) {
      SetmealVO setmealVO = setmealMapper.getByIdWithDish(id);
        return setmealVO;
    }

    /**
     * @description
     ***:修改套餐
     **/
    @Transactional
    public void update(SetmealDTO setmealDTO) {
    Setmeal setmeal = new Setmeal();
    BeanUtils.copyProperties(setmealDTO,setmeal);

    //修改套餐表，执行update
    setmealMapper.update(setmeal);

    //套餐id
    Long setmealId = setmealDTO.getId();

    //删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
    setmealDishMapper.deleteBySetmealId(setmealId);

    List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
    setmealDishes.forEach(setmealDish -> {
        setmealDish.setSetmealId(setmealId);
    });

    //重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);

    }

    /**
     * @description
     ***:起售停售套餐
     **/
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐是否有停售的菜品，有停售菜品提示“套餐内包含未起售菜品，无法起售”
        if (status == StatusConstant.ENABLE){
           List<Dish> dishList = dishMapper.getBySetmealId(id);
           if (dishList != null && dishList.size()>0){
               dishList.forEach(dish -> {
                   if (StatusConstant.DISABLE==dish.getStatus()){
                       throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                   }
               });
           }
        }

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

}
